[Dan Bridges]

Perhaps the Wav is in a unusual format (24-bit, Big-Endian). Open it in MediaInfo (https://mediaarea.net/en/MediaInfo/Download – when you first run it it will offer to become a r.click option in Windows File Explorer – very convenient) and report back. Here’s the Text-format report for a typical Signed 16-bit Little-Endian Wav file :

General

Complete name : D:\Testfile.wav
Format : Wave
File size : 252 MiB
Duration : 22 min 55 s
Overall bit rate mode : Constant
Overall bit rate : 1 536 kb/s
Writing application : Lavf58.42.100

Audio

Format : PCM
Format settings : Little / Signed
Codec ID : 1
Duration : 22 min 55 s
Bit rate mode : Constant
Bit rate : 1 536 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Bit depth : 16 bits
Stream size : 252 MiB (100%)